Knob



FIG. 1 is a front perspective view of a knob showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is an enlarged partial front perspective view of the claimed portion in FIG. 1 shown in an illustrative environment.

The broken line showing of various regions, including the unshaded areas therein, is for illustrative purposes and forms no part of the claimed design. 

The ornamental design for a knob, as shown and described. 